merge from dev

MediaBrowser.WebDashboard/Api/DashboardService.cs

@@ -345,6 +345,9 @@ namespace MediaBrowser.WebDashboard.Api
             DeleteFoldersByName(bowerPath, "grunt");
             DeleteFoldersByName(bowerPath, "rollups");
 
+            _fileSystem.DeleteDirectory(Path.Combine(bowerPath, "jquery", "external"), true);
+            _fileSystem.DeleteDirectory(Path.Combine(bowerPath, "jquery", "src"), true);
+          
             DeleteCryptoFiles(Path.Combine(bowerPath, "cryptojslib", "components"));
 
             DeleteFoldersByName(Path.Combine(bowerPath, "jquery"), "src");